The premiere episode of "Castle" now has a title and it will open with Kate Beckett trying to find what happened to Rick Castle. However, it looks like she and Castle's family are unlikely to find answers, immediately.

The premiere episode is titled "Driven," TV Line reports. Beckett will be seen investigating "the toughest case" of her life -- the disappearance of her fiancé Castle on their wedding day. "She's [Beckett] committed to getting to the bottom of what happened with Castle. That's really her focus and her mission. She's going to do that, and she's going to take that as far as she can go to get answers. That's what she's focused on," David Amann, the new showrunner of the show, said to Give Me My Remote.

The new season of "Castle" will pick-up from where it left off, but at some point, there is likely to be a "significant" time leap in the premiere episode, according to TV Line. Amann also hinted about the time leap in his interview with Give Me My Remote. He called the investigation "protracted" that does not throw-up any answer. Amann said, "... there's several months of not having any answers of exactly what happened ..."

The premiere episode of "Castle" Season 7 will tackle the questions about what happened to Castle and why. The disappearance of Castle is related to a new mythology, which revolves around him. The opening episodes are unlikely to provide all the answers related to this mythology. "When we get through episode two, we will resolve some questions of what happened to him, but not all of them," Amann told Give Me My Remote.

Meanwhile, TV Guide has reported that Rebecca Wisocky, who stars in "Devious Maids," has signed-on as a guest-star to portray the character of Dr. Elena Sarkov. The report reveals that Dr Sarkov is a "lead scientist at a cutting-edge research lab." Beckett and co will contact this character when a "mysterious unseen force" kills a pool shark, according to the report.

"Castle" is scheduled to return on Sept. 29, 2014, with 23 episodes of Season 7.